Welcome to HCM
We understand your concerns
I went through your problem description. In fact, you do not have any problem. Happy.
To satisfy a female a 2inch penis is more than enough, because the sensory portion on a female vagina is available up to two inches, then it is just a muscular hole.
There are certain oil massage
techniques to increase the length of penis upto 1 or two centimeters. These are mentioned in ancient Ayurveda texts and genuine. All other net advertisements are supposed to be non effective.
Therefore don't loose your money. Your penis has average length and you should be able to satisfy your partner.
Hope this clears your doubts. Available for further clarifications.